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制作了Ag2Cr2O7剂量计,并使用该剂量计测量了γ辐射场的剂量分布.结果表明:制作的剂量计重复性较好(1.37%).辐射场的角向剂量分布比较均匀,径向分布服从D.=b1R2+a规律,垂直方向呈非均匀分布.还分析了影响剂量分布均匀性的因素,并提出了提高辐照均匀度的方法.
The Ag2Cr2O7 dosimeter was fabricated and the dose distribution of the gamma radiation field was measured using this dosimeter. The results show that the dosimeter made is reproducible (1.37%). Radiation field angle dose distribution is more uniform, radial distribution obeys D. = B1R2 + a regular, non-uniform distribution of the vertical direction. The factors influencing the uniformity of dose distribution were also analyzed, and the methods to improve the uniformity of irradiation were put forward.